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Related Concept Videos

Preparation of Diols and Pinacol Rearrangement01:57

Preparation of Diols and Pinacol Rearrangement

Compounds bearing two hydroxyl groups are known as diols. When the hydroxyl groups are located on adjacent carbon atoms, the diols are called vicinal diols or glycols. Under acidic conditions, vicinal diols undergo a specific reaction called pinacol rearrangement.
The reaction begins with transferring a proton from the acid catalyst to one of the hydroxyl groups, producing an oxonium ion.
[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction01:16

[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction

The Diels–Alder reaction is an example of a thermal pericyclic reaction between a conjugated diene and an alkene or alkyne, commonly referred to as a dienophile. The reaction involves a concerted movement of six π electrons, four from the diene and two from the dienophile, forming an unsaturated six-membered ring. As a result, these reactions are classified as [4+2] cycloadditions.
Diels–Alder Reaction Forming Cyclic Products: Stereochemistry01:28

Diels–Alder Reaction Forming Cyclic Products: Stereochemistry

The Diels–Alder reaction is one of the robust methods for synthesizing unsaturated six-membered rings. The reaction involves a concerted cyclic movement of six π electrons: four π electrons from the diene and two π electrons from the dienophile.
Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids02:04

Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids

Diols are compounds with two hydroxyl groups. In addition to syn dihydroxylation, diols can also be synthesized through the process of anti dihydroxylation. The process involves treating an alkene with a peroxycarboxylic acid to form an epoxide. Epoxides are highly strained three-membered rings with oxygen and two carbons occupying the corners of an equilateral triangle. This step is followed by ring-opening of the epoxide in the presence of an aqueous acid to give a trans diol.
Diels–Alder Reaction Forming Bridged Bicyclic Products: Stereochemistry01:29

Diels–Alder Reaction Forming Bridged Bicyclic Products: Stereochemistry

Diels–Alder reactions between cyclic dienes locked in an s-cis configuration and dienophiles yield bridged bicyclic products.
Diels–Alder Reaction: Characteristics of Dienes01:29

Diels–Alder Reaction: Characteristics of Dienes

The Diels–Alder reaction brings together a diene and a dienophile to form a six-membered ring. Both components have unique characteristics that influence the rate of the reaction.
Characteristics of the diene
Conformation
The simplest example of a diene is 1,3-butadiene, an acyclic conjugated π system. At room temperature, the molecule exists as a mixture of s-cis and s-trans conformers by virtue of rotation around the carbon–carbon single bond. Although the s-trans isomer is more stable, the...

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Di-4-pyridylmethane-diol.

Warren R Knapp1, Robert L Laduca

  • 1Lyman Briggs College, Department of Chemistry, Michigan State University, East Lansing, MI 48825, USA.

Acta Crystallographica. Section E, Structure Reports Online
|January 5, 2011
PubMed
Summary
This summary is machine-generated.

This study reveals the crystal structure of C(11)H(10)N(2)O(2), detailing how molecules arrange and bond. The research highlights the formation of layered structures through specific hydrogen bonding interactions.

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Area of Science:

  • Crystallography
  • Materials Science
  • Supramolecular Chemistry

Background:

  • Understanding molecular arrangement is key to designing new materials.
  • Hydrogen bonding plays a crucial role in the self-assembly of molecules.
  • Crystallographic studies provide precise structural information.

Purpose of the Study:

  • To determine the crystal structure of the title compound C(11)H(10)N(2)O(2).
  • To investigate the intermolecular interactions, specifically hydrogen bonding.
  • To elucidate the self-assembly behavior leading to layered structures.

Main Methods:

  • Single-crystal X-ray diffraction was employed to analyze the crystal structure.
  • Analysis of crystallographic data to identify molecular symmetry elements.
  • Hydrogen bond analysis to characterize intermolecular interactions.

Main Results:

  • The crystal structure of C(11)H(10)N(2)O(2) was solved, revealing molecules situated on crystallographic twofold rotation axes.
  • O-H⋯N hydrogen bonds were identified between neighboring molecules.
  • These interactions facilitate the formation of two-dimensional square-grid layers parallel to the ab plane.

Conclusions:

  • The title compound exhibits a unique molecular arrangement dictated by crystallographic symmetry.
  • Specific hydrogen bonding interactions are responsible for the observed layered supramolecular architecture.
  • The findings contribute to the understanding of crystal engineering and the design of functional materials.